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对一维内弹道两相流方程进行特征分析，用特征理论和量级分析的方法，对一维内弹道两相流方程的初边值条件个数进行研究，本文所得结论与内弹道两相流数值模拟实践相一致。
The characteristic analysis of the one-dimensional internal-ballistic two-phase flow equation is carried out. The eigenvalue theory and the order of magnitude analysis method are used to study the initial boundary conditions of one-dimensional internal-ballistic two-phase flow equations. Flow numerical simulation practice is consistent.